body *,
page view {
    box-sizing: border-box;
    flex-shrink: 0;
}
body {
    font-family: PingFangSC-Regular, Roboto, Helvetica Neue, Helvetica, Tahoma,
    Arial, PingFang SC-Light, Microsoft YaHei;
    margin: 0;
}
button {
    margin: 0;
    padding: 0;
    border: 1px solid transparent;
    outline: none;
    background-color: transparent;
}

button:active {
    opacity: 0.6;
}
.flex-col {
    display: flex;
    flex-direction: column;
}
.flex-row {
    display: flex;
    flex-direction: row;
}
.justify-start {
    display: flex;
    justify-content: flex-start;
}
.justify-center {
    display: flex;
    justify-content: center;
}

.justify-end {
    display: flex;
    justify-content: flex-end;
}
.justify-evenly {
    display: flex;
    justify-content: space-evenly;
}
.justify-around {
    display: flex;
    justify-content: space-around;
}
.justify-between {
    display: flex;
    justify-content: space-between;
}
.align-start {
    display: flex;
    align-items: flex-start;
}
.align-center {
    display: flex;
    align-items: center;
}
.align-end {
    display: flex;
    align-items: flex-end;
}
